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  1. #1
    baby eater!
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    How to lace 28 hole rims to 36 hole hubs?

    I can't find any info on it anywhere...

    On the hub, would it be: 4 holes, empty hole, 3 holes, empty hole, 4 holes, empty hole, 3 holes, empty hole?

    It's the only pattern I can think of that would be even remotely balanced/symmetrical..

    And if so, what length spoke do you need for a 3x (all the same length or mixed lengths?) and how would you actually go about doing a 3x?

    Anything you could tell me would save my life..

  2. #2
    tarck bike.com exile 666pack's Avatar
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    Quote Originally Posted by oktokrewl View Post
    Anything you could tell me would save my life..
    don't do it. a rim with 36 holes is meant to be laced to a hub with 36 holes using 36 spokes.
    i wouldn't recommend doing this. something just seems really off to me about it.

    i wouldn't risk messing around with something like this on something as important as wheels.

    but hey, who am i to tell you what to do? try it and see what happens... you'll either have a sick wheel or you'll be in the hospital.

  3. #3
    baby eater!
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    it's actually my guy thats doing it.. right now.. hehe..

    and the reason is the only hubs the shop had were 36, and he has 28 hole tubulars.. we are on a week and a half break back home in LA, we just managed to get out of the caribbean during the whole hurricane business, but we didnt bring our wheels with us..

    so basically, its lace 28 hole wheels to 36 hole hubs.. or dont ride at all.. and not riding at all is unacceptable..

    btw.. Im lacing up neon green deep v's.. right now.. the neon green bike where every single part is green is slowly on its way to reality!!

  4. #4
    Senior Member filtersweep's Avatar
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    When you figure out how to calculate spoke length, please let me know...

  5. #5
    LF for the accentdeprived
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    Yeah, because there are no 28 hole hubs or 36 hole rims available in LA...
    Clever solution.
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  6. #6
    :jarckass: deathhare's Avatar
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    Quote Originally Posted by 666pack View Post
    don't do it.
    Quote Originally Posted by 666pack View Post
    i wouldn't recommend doing this.
    Quote Originally Posted by 666pack View Post
    i wouldn't risk messing around with something like this on something as important as wheels.
    Quote Originally Posted by 666pack View Post
    try it and see what happens..
    too many 666 packs today?

  7. #7
    jack of one or two trades Aeroplane's Avatar
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    Quote Originally Posted by LóFarkas View Post
    Yeah, because there are no 28 hole hubs or 36 hole rims available in LA...
    Clever solution.
    I think he said he's in the Caribbean right now, FWIW...

    Is this a front, or front and rear? If it's just front, you can do it radially. Otherwise, you'll have to do a hack-job of some cross lacing. I'm not going to do the math for you, but here's how you figure out the spoke length:

    Only think about one side of the hub and rim. You go in reference to what the normal radial spoke length would be on a rim that matched your hub. Then, figure out the angle of the spoke would be if it were displaced one one hole on this rim (i.e. a 1x lacing). Now, figure out whatever the angle of the spoke would be for whatever wacky-ass lacing system you come up with (you'll probably have multiple angles, since you won't have the same line-up for each spoke). Divide these angles by the theoretical 1x angle to get the "cross value" of the spokes. Then use spocalc.exe and put in your hubs and rims to get the effective rim diameter, hub flange diameter, flange distance from center, etc. When it asks for the lacing pattern, put in your "cross value(s)" and it should give you the proper length(s) to do whatever wacky-ass lacing pattern you came up with.
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  8. #8
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    it can be done. you have to use a hybrid spoking pattern. 2x leading/trailing mixed with a crows foot pattern on the same side. ive done it the other way, 36hole rim to a 28hole hub, but just for fun. the wheel never got ridden. calculating accurate spoke lengths has a direct correlation to the grade you got in high school trig.

    as for a rideable wheel, eh. your spoke tensions are going to be all over the place. id take a pic of my crazy wheel, but it doesnt photograph well.

  9. #9
    tarck bike.com exile 666pack's Avatar
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    Quote Originally Posted by deathhare View Post
    too many 666 packs today?
    haha. i'm just saying I wouldn't ride on it.

    but then again, i would also never shoot heroin into my veins; play russian roulette with a loaded ***; drive a bus with a bomb in it that explodes with the bus goes under fifty miles per hour; et cetera, et cetera, so on and so forth.

    something just makes me think that having eight empty holes on the rim MIGHT make it a bit weaker.


    but you've gotta make your own decisions in life.

  10. #10
    Senior Member iamtim's Avatar
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    Quote Originally Posted by 666pack View Post
    something just makes me think that having eight empty holes on the rim MIGHT make it a bit weaker.
    I think you've got it backwards... the OP wants to use a 28 hole RIM on a 36 hole HUB. There'd be eight empty holes on the hub, not the rim.

    That said, I agree with you. I wouldn't ride it either.

  11. #11
    Edificating dmotoguy's Avatar
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    people run hubs with open holes all of the time.. it doesnt weaken anything, you just have less spokes.
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  12. #12
    vernal stylostixis fix:'s Avatar
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    i think this is what you want
    http://sheldonbrown.com/mismatch/index.htm

  13. #13
    *****es love tarck kemmer's Avatar
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    Quote Originally Posted by fix: View Post
    i think this is what you want
    http://sheldonbrown.com/mismatch/index.htm
    Honestly, why you would ask a question here without searching sb.com is beyond me. The risk-of-getting-flamed to good-informaition ratio here is just too high.

  14. #14
    baby eater!
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    1. i went to several shops (i am currently in LA, but only for about 10 days..) and everyone had 28 hole front hubs.. but noone had 28 hole back hubs (well, none that are under $300)

    2. i saw that article on sheldon brown, but was wondering if there was any other info besides that.. that lacing patten is quite pretty, but this is the first wheelset we've built, and that is an advanced techinique..

    3. the shop we got hubs from said that we could do it with a 3 cross pattern, but it was late and busy in there, so i guess some stuff just slipped his mind, cuz it is SO not possible to do that, especially with only one spoke length.. we tried several times, but it just doesnt work


    4. we are going to another shop today to look for either 1 36 hole rim, and 1 28 hole hub, so it will be 28front/36back.. or a set of 36 hole rims..


    thanks for the help tho.. and the funny yelling at me

  15. #15
    jack of one or two trades Aeroplane's Avatar
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    Quote Originally Posted by oktokrewl View Post
    the shop we got hubs from said that we could do it with a 3 cross pattern, but it was late and busy in there, so i guess some stuff just slipped his mind, cuz it is SO not possible to do that, especially with only one spoke length..
    This is the key. You'll have multiple spoke lengths for each side of the hub. Not pretty, but it's possible.
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  16. #16
    nothing but a gnab gib
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    That wheel on Sheldon's site looks ****ing badass.

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    *****es love tarck kemmer's Avatar
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    Quote Originally Posted by oktokrewl View Post
    4. we are going to another shop today to look for either 1 36 hole rim, and 1 28 hole hub, so it will be 28front/36back.. or a set of 36 hole rims..
    If you have that option I'd definatly do it.

  18. #18
    Senior Member filtersweep's Avatar
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    I guess Sheldon explains it succinctly as follows:

    θ = 4θh
    φ = 2θr
    T = 4θh + 2θr

    Where for a 28 hole rim,
    θr = 360/28 = 12.857 degrees

    and for a 36 hole hub,
    θh = 360/36 = 10 degrees

    For the magenta spokes, the analysis is similar, and we get

    θ = 3θh
    φ = θr
    T = 3θh + θr

    The diagram for the blue spokes is not shown, but after a similar derivation we get

    θ = θh
    φ = 3θr
    T = θh + 3θr

  19. #19
    Invented the Skid Salute lamalex's Avatar
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    Quote Originally Posted by oktokrewl View Post
    btw.. Im lacing up neon green deep v's.. right now.. the neon green bike where every single part is green is slowly on its way to reality!!
    Make sure you post before it's finished so I can kill myself.

  20. #20
    ride on brother
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    36 hole hub 28 hole rim

    hi can you send me a pick of a lace job or a rought hole spacing to make it work this is for my boys 16" pit bike for his b day witch is on the 30th of june so i need to make this happen thanks for your reply daprice d49truck@cox.net

  21. #21
    cab horn
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    Quote Originally Posted by kemmer View Post
    Honestly, why you would ask a question here without searching sb.com is beyond me. The risk-of-getting-flamed to good-informaition ratio here is just too high.
    You must be new here
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  22. #22
    Team Beer Cynikal's Avatar
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    I think he was new here in 2007.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  23. #23
    cab horn
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    Quote Originally Posted by Cynikal View Post
    I think he was new here in 2007.
    /woosh
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